Study capillary-based gaseous detectors

We have studied gain vs. voltage characteristics and position resolutions of multistep capillary plates (two or three capillary plates operating in a cascade), as well as capillary plates operating in a mode where the main amplification occurs in between the capillary plate and the readout plate (parallel plate amplification mode). Results of these studies demonstrated that in parallel-plate amplification mode one can reach both high gains (>10/sup 5/) and good position resolutions (/spl sim/100/spl mu/m) even with a single step arrangement. This offers a compact amplification structure which can be used in many applications.